Originally Posted by Nilet699
haha that was a cheap answer! I think you can do better
Ok, so i change it to lower nitrates......if they never rose- ive obviously not tested this over a long term basis - i basically wouldnt need to change it for that.
What about other minerals etc etc that get used up in the tank? Doesnt a water change supplement these, how do you then deal with this - if we are going to go wildly of topic, i'd be happy to take this to PM. I dont want to ruin the thread.
sounds to me like this is a rather logical and natural continuation of the thread.
In Fw tanks you do have carbonate hardness (KH) (carbonate- ions) and general hardness (calcium,magnesium+ ions). Plus total dissolved solids as well.
I did have an increase in KH and GH in my tanks with a plain sand substrate but both remained constant and low in a tank with peat moss. And I did have problems with neon tetras with the plain substrate but all fish including neons lived for years and years with the peat moss.
PH in both tank rose to levels of 8.4-8.8 (api high range test kits).
While a water change will limit changes it will not totally reverse the effects. As the really really nerdy equation points out.
so what you have to do is find ways of balancing out those things as well.
Fw I use the peat moss.
For marine I use the diy two part method to maintain calcium, alk, magnesium.
To me the only real alternative is to be honest and run a totally open system. Hook your tank up to a constant water sounce like the ocean, a pond, or stream. And constantly pump water to the tank and let the tank water return to that source. And you would have to do it at a level to where you have several water changes each day.
In that way what is going on with tank is not relevant.
But of course the input water becomes the only thing that is relevant.
With a closed sytem balanced out stabilized, the input water is not relevant only the processes at work in the tank itself.